make it easier to abort the process of choosing a completion via the select-list

scheme/nuit-engine.scm

@@ -295,6 +295,7 @@
   (let loop ((ch (wait-for-input)) (c-x-pressed? #f)
 	     (completion-selector #f))
 
+    (debug-message "loop: " ch "|" c-x-pressed? "|" completion-selector)
     (cond
 
      ;; Ctrl-x -> wait for next input
@@ -487,7 +488,8 @@
      (with-lock executable-completions-lock
        (lambda()
 	 (set! executable-completions 
-	       (make-completion-set-for-executables (get-path-list))))))))
+	       (make-completion-set-for-executables (get-path-list)))
+	 (debug-message "finished scanning executable-completions-set"))))))
 
 (define (paint-bar-1)
   (mvwaddstr (app-window-curses-win bar-1) 0 1 "SCSH-NUIT")
@@ -955,17 +957,22 @@
 	     (select-list-selected-entry select-list)))
 	display-completed-line)
       #f)
-     (else
-      (let ((new-select-list
-	     (select-list-handle-key-press
-	      select-list
-	      (make-key-pressed-message 
-	       (active-command) (current-result)
-	       result-buffer key #f))))
-	(paint-completion-select-list
-	 new-select-list (last (buffer-text command-buffer)))
-	(make-completion-selector 
-	 new-select-list completions command arg arg-pos))))))
+      ((or (select-list-navigation-key? key)
+	   (select-list-marking-key? key))
+       (let ((new-select-list
+	      (select-list-handle-key-press
+	       select-list
+	       (make-key-pressed-message 
+		(active-command) (current-result)
+		result-buffer key #f))))
+	 (paint-completion-select-list
+	  new-select-list (last (buffer-text command-buffer)))
+	 (make-completion-selector 
+	  new-select-list completions command arg arg-pos)))
+      (else 
+       ;; #### FIXME we loose a character this way
+       (focus-command-buffer!)
+       #f))))
 
 (define (find-token-with-cursor tokens/cursor-list)
   (debug-message "find-token-with-cursor " tokens/cursor-list)

scheme/nuit-packages.scm

@@ -156,7 +156,10 @@
 	  paint-selection-list
 	  paint-selection-list-at
 	  select-list-get-selection
-	  select-list-selected-entry))
+	  select-list-selected-entry
+
+	  select-list-navigation-key?
+	  select-list-marking-key?))
 
 (define-structure select-list select-list-interface
   (open scheme

scheme/select-list.scm

@@ -40,6 +40,7 @@
 (define (select-list-handle-key-press select-list key-message)
   (let ((key (key-pressed-message-key key-message))
 	(result-buffer (key-pressed-message-result-buffer key-message)))
+    (debug-message "select-list-handle-key-press " select-list " " key)
     (cond 
      ((= key key-m)
       (mark-current-line select-list))
@@ -52,6 +53,12 @@
      (else
       select-list))))
 
+(define (select-list-navigation-key? key)
+  (or (= key key-up) (= key key-down)))
+
+(define (select-list-marking-key? key)
+  (or (= key key-m) (= key key-u)))
+
 (define (mark/unmark-current-line-maker mark)
   (lambda (select-list)
     (let* ((index (select-list-cursor-index select-list))